Machine for making millboard.



No. 840,386. PATENTED JAN. 1, 1907.

' W.-SILLMAN.

MACHINE FOR MAKING MILLBOARD.

,APPLIUATION FILED JUNE 11, 1906. v

' 2 SHEETS-SHEET 1.

vW H

Ill. IIIHI 'No. 840,386. PATBNTED JAN; l, 1907.

w. SILLMA'N. MACHINE FOR MAKING MILLBOARD.

APPLICATION FILED JUNE 11, 1906.

2 SH-EETS-SHEET 2.

' n6. ceases.

g WILLIiAM s LLM N, OFTNEW roan, n.

MACHI E Fo' iM mG MILLBOABD.'

To all whom it may concern:

,[Be'it known' that I, WILLIAM SILLMAN, a

citizen ofthe United States of America, and a resident of the bhroughof' Brooklyn, county of Kin s, city'and State of New York,

have invented certain new and useful Improvements in Machines for Making Millcard, of which the following is a specification.

' My invention relates generally to' the manufacture. of'plates, sheets, or boards out of pulp-like mixtures, and more specifically consists of improved mechanism for economically handling. mixtures containing ingre- Heretofore 11; has been customary to em ploy apparatus of the general paper-making or cardboard-making machine type, known in the art as wet-machines, for the urpose of making millboard and heavier'p ate's' or sheets out of various pulped fibrous materials, including short asbestos fibers mixed withvvarious pulverized materials as'fillers and .as active constituents in the composition. When a material which is finely pulverized, such ashydraulic cement, and which has considerable specific gravity is employed in largequantity in such manufacture, the

same 1s wasted in large partby being drawn through the meshes oi the .wire-cloth-covered roll upon which the pulp material is originally deposited by the action of suction and so carried; away and also by being deposited in the bottom of the tank of the wet-machine by virtueof its greater specific gravity.- My

invention overcomes this feature of waste by practically compelling all of the heavier and finely-divided constituent to' enter into the 4 iinished roduct, prevents any premature settlrig'o the cement and has other advantagesand economies. a

One form of apparatus embodying my inven' iorkis illustrated in the accompanying two s eets ofdrawings, in which- .Figurtkiis a side elevation of the ma chine ivith parts broken away, and 2 is a detailoi the sive-shaking apparatus.

Throughout the drawings like referencefigures indicate like parts.

1 1 represent parts of the mainframe of -the machine, and 2 is an endless band of felt.

running over a seriesfof guideollers 33, &c

v Specification of Letters Patent. I

' Application'filed June11,1906i Serial .No. 321.113.

here illustrated.)

' 17 is a beater for cleaning said felt, 4 an adjusting-roll for guiding the felt in proper rev f repe ed rem- .1 .0 2.

lation to thebeater, the position of which is controlled by the adjustingelever18. 23 23, &c., are suction boxes. Of any convenient form, overwhich thefelt -2 passes. The suction may be produced by steam-jets, blowers, or in any convenient manner. (Not The .felt 2 is properly guided with reference to these suction-boxes by the adjustable roll 5, the position of which is controlled by the screw 21, operated by the hand-wheel shaft 6.is a tightening-roll for the endless band of felt, the position oi which is controlled by the screw 19 and the hand-wheel 20. v dients of great fineness ofpulverization and K DOIlSldlflblB specific gravity. v

-7 is a lower press-roll mounted in stationary journal-bearings 8, and 9 the upper press.

roll mounted inmovable journahbearings 10,

carried by the lever 13, pivoted tothe main:

sure-lever 16.

11 is a screw for limiting the downward motion of the upper press-roll 9 by means of the adjustable hand-wheel. nutl2. The endless-felt of course passes between the pressrolls, as shown.

37 is the lower drying-roll for the felt mountedin stationary journal-bearings 38, and 39 is the upper drying-roll mounted in journal-bearings 40 in. the lever 42, pivoted to the main frame at 43 and pressed downward by the adjustable weight M.- Before entering thcs'e drying-rolls the felt is further cleansed by the water-spray 59.

24 is a tank or vat to which; one portipn of the stock or material, such as asbestos fiber, beaten up with a sufficient quantity of water is delivered, together with additional-water, it're'quired, as in the process heretofore used uponthe wet-machinc. In this .vat is the usual rotating-wire-Cloth cylinder 25, the interior portion of which is drained by the outlet connection 26.

.46 47 are stirrers or agitators located in the bottom of the vat.

V 48 is a cleaning-roll by which any material picked up by th'e wire-cloth and not trans- .ferredto the endless belt 2 may be removed.

The guide-roller 27 is carried on the bell crank 28, pivoted to the main frame and adjustable through the worm-wheel and wormscrew mechanism 29.

52 is a sieve of any preferred construction containing dry finely-pulverized cement. A

suitable shaking or jigging motion is given to rocked by arm 56, engag ng a grooved camwheel 55, rotated by belt 57, running over pulley 58 on the shaft of guide-roller 27.

i The operation of my invention is as follows: The apparatus being set in motion, a

semifluid film or layer of felted asbestos fiber will be deposited upon the wire-cloth cylinder and in turn will be transferred'to the endless felt 2 in the ordinaryand well-understood manner. As this layer of material passes under the sieve 52 a suitable quantity of finely-divided cementis deposited upon it. A compound layer of cement and pulp is thus formed on the felt 2, and as this passes over the suction-boxes 23 23, &c., a considerable quantity of the water or other liquid is sucked down through the felt and the layer of material on the felt is left in a sufficiently dry condition to adhere to the upper pressroll 9 as the felt'passes through said pressrolls. This press-roll is usually made of iron. -A film of material is therefore wound up on the upper press-roll 9, the same rising as the thickness of the Winding on its surface increases until a predetermined thicknessis attained, when the cylindrical covering. thus. formed is slit longitudinally of the cylinder; by a knife in the hands of the operator and removed in the shape of a plate or sheet whose length is the length of the cylinder and whose width is the circumference thereof! The felt from which the major portion of the.

material has thus been removed passes on down around the guide-rolls 4 and up bythe beater 17, which knocks out of the felt the small uantity of material remaining therein. The fe t then passes between the drying-rolls 37 3 9, which squeezethc moisture out of it, and thence around the tightening-roll 6 back to the wire-cloth cylinder, where it again has deposited upon it the film of asbestos, to

which cementis subsequently added, as before described.

The advantages of my invention comprise the practically complete saving of all waste of material there being no opportunity for any of the cement or other substance to escape de osition upon the felt 2, and the case of regu ation of the raw materialsand the machine and process at every point of opera-- It is evident of course that various changes could be made in the, relative arrangement and form of the prrts of my invention without departing from the spirit and scope thereof so long as the general principle of operation above'set forth be adhered to.

, In case more water were needed to dissolve and set the dried cement the action of the suction-boxes may be modified or dispensed with and, if desired, more water added tothe pulp in the mixing-frank, or water may be sprinkled upon the layer of material formed on the endless belt 2.

llaving therefore described my invention, 1 claim 1. In a machine for making millboard and similar substances, the combination with the ordinary mechanism of a wet paper-making machine lllOllldllig an endless band of felt on whlch a semifluid film of felted fibers is collected, of a mechanism located over said endless band of felt adapted to deposit finelydivided dry material thereon.

2. In a machine for making millboard and similar substances, the combination with the ordinary mechanism of a wet paper-making machine including an endless band of feltv on which a semifiuid film of felted fibers is collected, of a mechanism located over said endless band of felt adapted todeposit finely-divided dry material thereon, said lastmentioned mechanism comprising a sieve paper-machine" for and connections to the. shaking said sieve.

3. In a machine for making millboard and similar substances, the combinatio'n'with the ordinary mechanism of a wet paper-mark ing machine including an endless band of felt on whicha felted film of fibers is collected, ofva mechanism located over said end- 4 less band of felt'adapted to deposit finely-divided dry material thereon, and means or varying the amount of water in the mixture formed on the felt.

Signed at Brookly- 1906. i

' WILT'HM SILLMAN. Witnesses:

CHAS. CURNow, E. N; Roman.

this hth day of June, 

